PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

GM263Wattmeter

Microwave Devices Inc · NSN 6625-00-877-4136 · FSC 6625 · No Item Name Available
Verified by PartsTable
NSN 6625-00-877-4136 — this item is cataloged by the U.S. Government under National Stock Number 6625-00-877-4136. Primary manufacturer part number: GM263.
Features
  • Wattmeter — FSC 6625
  • Supplementary Features: MANUFACTURERS NAME: DIRECTIONAL WWATTMETER
  • Reference Data and Literature: T.O. 33A1-13-413-1
  • Style Designator: RECTANGULAR SURFACE MTG
  • Functional Description: A DIRECTIONAL RF MEASURING DEVICE DESIGNED TO MONITOR BOTH TRANSMITTER AND ANTENNA REFLECTION CHARACTERISTICS IN THE FREQUENCY RANGE FROM 2 TO 30 MEGAHERTZ WHILE THE EQUIPMENT UNDER TEST IS IN USE
  • Installation Design: BENCH
  • Indicator Type: DIAL W/POINTER
  • Supplementary Features: MANUFACTURERS NAME: DIRECTIONAL WWATTMETER
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Wattmeter, cataloged under National Stock Number 6625-00-877-4136, is classified within Federal Supply Class 6625 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Microwave Devices Inc. Government technical data includes 12 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 4 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active. Unit of issue: EA.

Technical Specifications
ParameterValue
NSN6625-00-877-4136
Primary Part NumberGM263
Item NameWattmeter
FSC / FSG6625 / 66 — No Item Name Available
ManufacturerMicrowave Devices Inc
StatusACTIVE
Supplementary FeaturesMANUFACTURERS NAME: DIRECTIONAL WWATTMETER
Reference Data and LiteratureT.O. 33A1-13-413-1
Style DesignatorRECTANGULAR SURFACE MTG
Functional DescriptionA DIRECTIONAL RF MEASURING DEVICE DESIGNED TO MONITOR BOTH TRANSMITTER AND ANTENNA REFLECTION CHARACTERISTICS IN THE FREQUENCY RANGE FROM 2 TO 30 MEGAHERTZ WHILE THE EQUIPMENT UNDER TEST IS IN USE
Installation DesignBENCH
Indicator TypeDIAL W/POINTER
Supplementary FeaturesMANUFACTURERS NAME: DIRECTIONAL WWATTMETER
Reference Data and LiteratureT.O. 33A1-13-413-1
Style DesignatorRECTANGULAR SURFACE MTG
Functional DescriptionA DIRECTIONAL RF MEASURING DEVICE DESIGNED TO MONITOR BOTH TRANSMITTER AND ANTENNA REFLECTION CHARACTERISTICS IN THE FREQUENCY RANGE FROM 2 TO 30 MEGAHERTZ WHILE THE EQUIPMENT UNDER TEST IS IN USE
Installation DesignBENCH
Indicator TypeDIAL W/POINTER
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Shelf Life Code0
Criticality CodeU
Unit of IssueEA
SMR CodeJU
Weight2.0000 lbs
Cube0.3554 cu ft
Verified Substitutes 4
Voltmeter
5999-00-033-551210-40450-12S INTERCHANGEABLE
Shielding Gasket,electronic
Amphenol Corp Div Amphenol Aerospace Operations
6625-00-918-3508263 INTERCHANGEABLE
Multimeter
Simpson Electric Company, Inc.
5999-01-029-09012144087-1 INTERCHANGEABLE
Clip,electrical
Honeywell Intl Inc Defense Avionics Systems Former Test Systems Div
Cross-Reference Index
Part NumberManufacturer
GM263 PRIMARY Microwave Devices Inc (USA)
263 Microwave Devices Inc (USA)
Related Parts
6625-01-259-1545SUCCESSOR
VOLTMETER
5999-00-033-5512INTERCHANGEABLE
SHIELDING GASKET,ELECTRONIC
10-40450-12S
6625-00-918-3508INTERCHANGEABLE
MULTIMETER
263
5999-01-029-0901INTERCHANGEABLE
CLIP,ELECTRICAL
2144087-1

Frequently Asked Questions

What is NSN 6625-00-877-4136?

NSN 6625-00-877-4136 is a Wattmeter, manufactured by Microwave Devices Inc, classified under FSC 6625 (No Item Name Available). Status: active.

What are the part numbers for NSN 6625-00-877-4136?

NSN 6625-00-877-4136 has 2 cross-referenced part numbers: GM263 (Microwave Devices Inc), 263 (Microwave Devices Inc).

What NSN replaces 6625-00-877-4136?

There are 4 known substitutes for 6625-00-877-4136: 6625-01-259-1545, 5999-00-033-5512, 6625-00-918-3508 and 1 more. Verify interchangeability with system specifications before substitution.

What are the specifications of GM263?

Key specifications for GM263: Supplementary Features: MANUFACTURERS NAME: DIRECTIONAL WWATTMETER; Reference Data and Literature: T.O. 33A1-13-413-1; Style Designator: RECTANGULAR SURFACE MTG; Functional Description: A DIRECTIONAL RF MEASURING DEVICE DESIGNED TO MONITOR BOTH TRANSMITTER AND ANTENNA REFLECTION CHARACTERISTICS IN THE FREQUENCY RANGE FROM 2 TO 30 MEGAHERTZ WHILE THE EQUIPMENT UNDER TEST IS IN USE. 22 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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